Nearby star could explain why our sun didn't have sunspots for 70 years - Phys.org The number of sunspots on our sun typically ebbs and flows in a predictable 11-year cycle, but one unusual 70-year period when sunspots were incredibly rare has mystified scientists for 300 years. Now Author : Gail McCormick?

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Last-modified: 2022-04-10 (日) 05:56:07 (754d)